Nope.
With DD#1 I was dilated to a 2-3 for about 4 weeks and had her 3 days past my due date.
With DD#2 I wasn't dilated at all when I had my 38 week appointment. I had DD#2 the following day after my appointment @ 38w6d.
Overall, being dilated means nothing. I plan on declining internals this time around because I don't want to work myself up over not being dilated, even though I know it means nothing.